git.oblomov.eu Git - linux-2.6/blob - drivers/s390/scsi/zfcp_fc.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * Fibre Channel related functions for the zfcp device driver.
   5  *
   6  * Copyright IBM Corporation 2008
   7  */
   8
   9 #include "zfcp_ext.h"
  10
  11 struct ct_iu_gpn_ft_req {
  12         struct ct_hdr header;
  13         u8 flags;
  14         u8 domain_id_scope;
  15         u8 area_id_scope;
  16         u8 fc4_type;
  17 } __attribute__ ((packed));
  18
  19 struct gpn_ft_resp_acc {
  20         u8 control;
  21         u8 port_id[3];
  22         u8 reserved[4];
  23         u64 wwpn;
  24 } __attribute__ ((packed));
  25
  26 #define ZFCP_GPN_FT_ENTRIES ((PAGE_SIZE - sizeof(struct ct_hdr)) \
  27                                 / sizeof(struct gpn_ft_resp_acc))
  28 #define ZFCP_GPN_FT_BUFFERS 4
  29 #define ZFCP_GPN_FT_MAX_ENTRIES ZFCP_GPN_FT_BUFFERS * (ZFCP_GPN_FT_ENTRIES + 1)
  30
  31 struct ct_iu_gpn_ft_resp {
  32         struct ct_hdr header;
  33         struct gpn_ft_resp_acc accept[ZFCP_GPN_FT_ENTRIES];
  34 } __attribute__ ((packed));
  35
  36 struct zfcp_gpn_ft {
  37         struct zfcp_send_ct ct;
  38         struct scatterlist sg_req;
  39         struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS];
  40 };
  41
  42 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
  43                                    struct fcp_rscn_element *elem)
  44 {
  45         unsigned long flags;
  46         struct zfcp_port *port;
  47
  48         read_lock_irqsave(&zfcp_data.config_lock, flags);
  49         list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) {
  50                 if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status))
  51                         continue;
  52                 /* FIXME: ZFCP_STATUS_PORT_DID_DID check is racy */
  53                 if (!atomic_test_mask(ZFCP_STATUS_PORT_DID_DID, &port->status))
  54                         /* Try to connect to unused ports anyway. */
  55                         zfcp_erp_port_reopen(port,
  56                                              ZFCP_STATUS_COMMON_ERP_FAILED,
  57                                              82, fsf_req);
  58                 else if ((port->d_id & range) == (elem->nport_did & range))
  59                         /* Check connection status for connected ports */
  60                         zfcp_test_link(port);
  61         }
  62         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
  63 }
  64
  65 static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req)
  66 {
  67         struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data;
  68         struct fcp_rscn_head *fcp_rscn_head;
  69         struct fcp_rscn_element *fcp_rscn_element;
  70         u16 i;
  71         u16 no_entries;
  72         u32 range_mask;
  73
  74         fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data;
  75         fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head;
  76
  77         /* see FC-FS */
  78         no_entries = fcp_rscn_head->payload_len /
  79                         sizeof(struct fcp_rscn_element);
  80
  81         for (i = 1; i < no_entries; i++) {
  82                 /* skip head and start with 1st element */
  83                 fcp_rscn_element++;
  84                 switch (fcp_rscn_element->addr_format) {
  85                 case ZFCP_PORT_ADDRESS:
  86                         range_mask = ZFCP_PORTS_RANGE_PORT;
  87                         break;
  88                 case ZFCP_AREA_ADDRESS:
  89                         range_mask = ZFCP_PORTS_RANGE_AREA;
  90                         break;
  91                 case ZFCP_DOMAIN_ADDRESS:
  92                         range_mask = ZFCP_PORTS_RANGE_DOMAIN;
  93                         break;
  94                 case ZFCP_FABRIC_ADDRESS:
  95                         range_mask = ZFCP_PORTS_RANGE_FABRIC;
  96                         break;
  97                 default:
  98                         continue;
  99                 }
 100                 _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element);
 101         }
 102         schedule_work(&fsf_req->adapter->scan_work);
 103 }
 104
 105 static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, wwn_t wwpn)
 106 {
 107         struct zfcp_adapter *adapter = req->adapter;
 108         struct zfcp_port *port;
 109         unsigned long flags;
 110
 111         read_lock_irqsave(&zfcp_data.config_lock, flags);
 112         list_for_each_entry(port, &adapter->port_list_head, list)
 113                 if (port->wwpn == wwpn)
 114                         break;
 115         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 116
 117         if (port && (port->wwpn == wwpn))
 118                 zfcp_erp_port_forced_reopen(port, 0, 83, req);
 119 }
 120
 121 static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req)
 122 {
 123         struct fsf_status_read_buffer *status_buffer =
 124                 (struct fsf_status_read_buffer *)req->data;
 125         struct fsf_plogi *els_plogi =
 126                 (struct fsf_plogi *) status_buffer->payload.data;
 127
 128         zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn);
 129 }
 130
 131 static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req)
 132 {
 133         struct fsf_status_read_buffer *status_buffer =
 134                 (struct fsf_status_read_buffer *)req->data;
 135         struct fcp_logo *els_logo =
 136                 (struct fcp_logo *) status_buffer->payload.data;
 137
 138         zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn);
 139 }
 140
 141 /**
 142  * zfcp_fc_incoming_els - handle incoming ELS
 143  * @fsf_req - request which contains incoming ELS
 144  */
 145 void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req)
 146 {
 147         struct fsf_status_read_buffer *status_buffer =
 148                 (struct fsf_status_read_buffer *) fsf_req->data;
 149         unsigned int els_type = status_buffer->payload.data[0];
 150
 151         zfcp_san_dbf_event_incoming_els(fsf_req);
 152         if (els_type == LS_PLOGI)
 153                 zfcp_fc_incoming_plogi(fsf_req);
 154         else if (els_type == LS_LOGO)
 155                 zfcp_fc_incoming_logo(fsf_req);
 156         else if (els_type == LS_RSCN)
 157                 zfcp_fc_incoming_rscn(fsf_req);
 158 }
 159
 160 static void zfcp_ns_gid_pn_handler(unsigned long data)
 161 {
 162         struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data;
 163         struct zfcp_send_ct *ct = &gid_pn->ct;
 164         struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req);
 165         struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp);
 166         struct zfcp_port *port = gid_pn->port;
 167
 168         if (ct->status)
 169                 goto out;
 170         if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) {
 171                 atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status);
 172                 goto out;
 173         }
 174         /* paranoia */
 175         if (ct_iu_req->wwpn != port->wwpn)
 176                 goto out;
 177         /* looks like a valid d_id */
 178         port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK;
 179         atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
 180 out:
 181         mempool_free(gid_pn, port->adapter->pool.data_gid_pn);
 182 }
 183
 184 /**
 185  * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request
 186  * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed
 187  * return: -ENOMEM on error, 0 otherwise
 188  */
 189 int zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action)
 190 {
 191         int ret;
 192         struct zfcp_gid_pn_data *gid_pn;
 193         struct zfcp_adapter *adapter = erp_action->adapter;
 194
 195         gid_pn = mempool_alloc(adapter->pool.data_gid_pn, GFP_ATOMIC);
 196         if (!gid_pn)
 197                 return -ENOMEM;
 198
 199         memset(gid_pn, 0, sizeof(*gid_pn));
 200
 201         /* setup parameters for send generic command */
 202         gid_pn->port = erp_action->port;
 203         gid_pn->ct.port = adapter->nameserver_port;
 204         gid_pn->ct.handler = zfcp_ns_gid_pn_handler;
 205         gid_pn->ct.handler_data = (unsigned long) gid_pn;
 206         gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT;
 207         gid_pn->ct.req = &gid_pn->req;
 208         gid_pn->ct.resp = &gid_pn->resp;
 209         gid_pn->ct.req_count = 1;
 210         gid_pn->ct.resp_count = 1;
 211         sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req,
 212                     sizeof(struct ct_iu_gid_pn_req));
 213         sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp,
 214                     sizeof(struct ct_iu_gid_pn_resp));
 215
 216         /* setup nameserver request */
 217         gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION;
 218         gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE;
 219         gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER;
 220         gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS;
 221         gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN;
 222         gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_MAX_SIZE;
 223         gid_pn->ct_iu_req.wwpn = erp_action->port->wwpn;
 224
 225         ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp,
 226                                erp_action);
 227         if (ret)
 228                 mempool_free(gid_pn, adapter->pool.data_gid_pn);
 229         return ret;
 230 }
 231
 232 /**
 233  * zfcp_fc_plogi_evaluate - evaluate PLOGI playload
 234  * @port: zfcp_port structure
 235  * @plogi: plogi payload
 236  *
 237  * Evaluate PLOGI playload and copy important fields into zfcp_port structure
 238  */
 239 void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi)
 240 {
 241         port->maxframe_size = plogi->serv_param.common_serv_param[7] |
 242                 ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8);
 243         if (plogi->serv_param.class1_serv_param[0] & 0x80)
 244                 port->supported_classes |= FC_COS_CLASS1;
 245         if (plogi->serv_param.class2_serv_param[0] & 0x80)
 246                 port->supported_classes |= FC_COS_CLASS2;
 247         if (plogi->serv_param.class3_serv_param[0] & 0x80)
 248                 port->supported_classes |= FC_COS_CLASS3;
 249         if (plogi->serv_param.class4_serv_param[0] & 0x80)
 250                 port->supported_classes |= FC_COS_CLASS4;
 251 }
 252
 253 struct zfcp_els_adisc {
 254         struct zfcp_send_els els;
 255         struct scatterlist req;
 256         struct scatterlist resp;
 257         struct zfcp_ls_adisc ls_adisc;
 258         struct zfcp_ls_adisc_acc ls_adisc_acc;
 259 };
 260
 261 static void zfcp_fc_adisc_handler(unsigned long data)
 262 {
 263         struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data;
 264         struct zfcp_port *port = adisc->els.port;
 265         struct zfcp_ls_adisc_acc *ls_adisc = &adisc->ls_adisc_acc;
 266
 267         if (adisc->els.status) {
 268                 /* request rejected or timed out */
 269                 zfcp_erp_port_forced_reopen(port, 0, 63, NULL);
 270                 goto out;
 271         }
 272
 273         if (!port->wwnn)
 274                 port->wwnn = ls_adisc->wwnn;
 275
 276         if (port->wwpn != ls_adisc->wwpn)
 277                 zfcp_erp_port_reopen(port, 0, 64, NULL);
 278
 279  out:
 280         zfcp_port_put(port);
 281         kfree(adisc);
 282 }
 283
 284 static int zfcp_fc_adisc(struct zfcp_port *port)
 285 {
 286         struct zfcp_els_adisc *adisc;
 287         struct zfcp_adapter *adapter = port->adapter;
 288
 289         adisc = kzalloc(sizeof(struct zfcp_els_adisc), GFP_ATOMIC);
 290         if (!adisc)
 291                 return -ENOMEM;
 292
 293         adisc->els.req = &adisc->req;
 294         adisc->els.resp = &adisc->resp;
 295         sg_init_one(adisc->els.req, &adisc->ls_adisc,
 296                     sizeof(struct zfcp_ls_adisc));
 297         sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc,
 298                     sizeof(struct zfcp_ls_adisc_acc));
 299
 300         adisc->els.req_count = 1;
 301         adisc->els.resp_count = 1;
 302         adisc->els.adapter = adapter;
 303         adisc->els.port = port;
 304         adisc->els.d_id = port->d_id;
 305         adisc->els.handler = zfcp_fc_adisc_handler;
 306         adisc->els.handler_data = (unsigned long) adisc;
 307         adisc->els.ls_code = adisc->ls_adisc.code = ZFCP_LS_ADISC;
 308
 309         /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports
 310            without FC-AL-2 capability, so we don't set it */
 311         adisc->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host);
 312         adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host);
 313         adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host);
 314
 315         return zfcp_fsf_send_els(&adisc->els);
 316 }
 317
 318 /**
 319  * zfcp_test_link - lightweight link test procedure
 320  * @port: port to be tested
 321  *
 322  * Test status of a link to a remote port using the ELS command ADISC.
 323  * If there is a problem with the remote port, error recovery steps
 324  * will be triggered.
 325  */
 326 void zfcp_test_link(struct zfcp_port *port)
 327 {
 328         int retval;
 329
 330         zfcp_port_get(port);
 331         retval = zfcp_fc_adisc(port);
 332         if (retval == 0)
 333                 return;
 334
 335         /* send of ADISC was not possible */
 336         zfcp_port_put(port);
 337         if (retval != -EBUSY)
 338                 zfcp_erp_port_forced_reopen(port, 0, 65, NULL);
 339 }
 340
 341 static int zfcp_scan_get_nameserver(struct zfcp_adapter *adapter)
 342 {
 343         int ret;
 344
 345         if (!adapter->nameserver_port)
 346                 return -EINTR;
 347
 348         if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
 349                                &adapter->nameserver_port->status)) {
 350                 ret = zfcp_erp_port_reopen(adapter->nameserver_port, 0, 148,
 351                                            NULL);
 352                 if (ret)
 353                         return ret;
 354                 zfcp_erp_wait(adapter);
 355         }
 356         return !atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
 357                                   &adapter->nameserver_port->status);
 358 }
 359
 360 static void zfcp_gpn_ft_handler(unsigned long _done)
 361 {
 362         complete((struct completion *)_done);
 363 }
 364
 365 static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft)
 366 {
 367         struct scatterlist *sg = &gpn_ft->sg_req;
 368
 369         kfree(sg_virt(sg)); /* free request buffer */
 370         zfcp_sg_free_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS);
 371
 372         kfree(gpn_ft);
 373 }
 374
 375 static struct zfcp_gpn_ft *zfcp_alloc_sg_env(void)
 376 {
 377         struct zfcp_gpn_ft *gpn_ft;
 378         struct ct_iu_gpn_ft_req *req;
 379
 380         gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL);
 381         if (!gpn_ft)
 382                 return NULL;
 383
 384         req = kzalloc(sizeof(struct ct_iu_gpn_ft_req), GFP_KERNEL);
 385         if (!req) {
 386                 kfree(gpn_ft);
 387                 gpn_ft = NULL;
 388                 goto out;
 389         }
 390         sg_init_one(&gpn_ft->sg_req, req, sizeof(*req));
 391
 392         if (zfcp_sg_setup_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS)) {
 393                 zfcp_free_sg_env(gpn_ft);
 394                 gpn_ft = NULL;
 395         }
 396 out:
 397         return gpn_ft;
 398 }
 399
 400
 401 static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft,
 402                                   struct zfcp_adapter *adapter)
 403 {
 404         struct zfcp_send_ct *ct = &gpn_ft->ct;
 405         struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req);
 406         struct completion done;
 407         int ret;
 408
 409         /* prepare CT IU for GPN_FT */
 410         req->header.revision = ZFCP_CT_REVISION;
 411         req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE;
 412         req->header.gs_subtype = ZFCP_CT_NAME_SERVER;
 413         req->header.options = ZFCP_CT_SYNCHRONOUS;
 414         req->header.cmd_rsp_code = ZFCP_CT_GPN_FT;
 415         req->header.max_res_size = (sizeof(struct gpn_ft_resp_acc) *
 416                                         (ZFCP_GPN_FT_MAX_ENTRIES - 1)) >> 2;
 417         req->flags = 0;
 418         req->domain_id_scope = 0;
 419         req->area_id_scope = 0;
 420         req->fc4_type = ZFCP_CT_SCSI_FCP;
 421
 422         /* prepare zfcp_send_ct */
 423         ct->port = adapter->nameserver_port;
 424         ct->handler = zfcp_gpn_ft_handler;
 425         ct->handler_data = (unsigned long)&done;
 426         ct->timeout = 10;
 427         ct->req = &gpn_ft->sg_req;
 428         ct->resp = gpn_ft->sg_resp;
 429         ct->req_count = 1;
 430         ct->resp_count = ZFCP_GPN_FT_BUFFERS;
 431
 432         init_completion(&done);
 433         ret = zfcp_fsf_send_ct(ct, NULL, NULL);
 434         if (!ret)
 435                 wait_for_completion(&done);
 436         return ret;
 437 }
 438
 439 static void zfcp_validate_port(struct zfcp_port *port)
 440 {
 441         struct zfcp_adapter *adapter = port->adapter;
 442
 443         atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status);
 444
 445         if (port == adapter->nameserver_port)
 446                 return;
 447         if ((port->supported_classes != 0) || (port->units != 0)) {
 448                 zfcp_port_put(port);
 449                 return;
 450         }
 451         zfcp_erp_port_shutdown(port, 0, 151, NULL);
 452         zfcp_erp_wait(adapter);
 453         zfcp_port_put(port);
 454         zfcp_port_dequeue(port);
 455 }
 456
 457 static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
 458 {
 459         struct zfcp_send_ct *ct = &gpn_ft->ct;
 460         struct scatterlist *sg = gpn_ft->sg_resp;
 461         struct ct_hdr *hdr = sg_virt(sg);
 462         struct gpn_ft_resp_acc *acc = sg_virt(sg);
 463         struct zfcp_adapter *adapter = ct->port->adapter;
 464         struct zfcp_port *port, *tmp;
 465         u32 d_id;
 466         int ret = 0, x, last = 0;
 467
 468         if (ct->status)
 469                 return -EIO;
 470
 471         if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) {
 472                 if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD)
 473                         return -EAGAIN; /* might be a temporary condition */
 474                 return -EIO;
 475         }
 476
 477         if (hdr->max_res_size)
 478                 return -E2BIG;
 479
 480         down(&zfcp_data.config_sema);
 481
 482         /* first entry is the header */
 483         for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES && !last; x++) {
 484                 if (x % (ZFCP_GPN_FT_ENTRIES + 1))
 485                         acc++;
 486                 else
 487                         acc = sg_virt(++sg);
 488
 489                 last = acc->control & 0x80;
 490                 d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 |
 491                        acc->port_id[2];
 492
 493                 /* skip the adapter's port and known remote ports */
 494                 if (acc->wwpn == fc_host_port_name(adapter->scsi_host))
 495                         continue;
 496                 port = zfcp_get_port_by_wwpn(adapter, acc->wwpn);
 497                 if (port) {
 498                         zfcp_port_get(port);
 499                         continue;
 500                 }
 501
 502                 port = zfcp_port_enqueue(adapter, acc->wwpn,
 503                                          ZFCP_STATUS_PORT_DID_DID |
 504                                          ZFCP_STATUS_COMMON_NOESC, d_id);
 505                 if (IS_ERR(port))
 506                         ret = PTR_ERR(port);
 507                 else
 508                         zfcp_erp_port_reopen(port, 0, 149, NULL);
 509         }
 510
 511         zfcp_erp_wait(adapter);
 512         list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list)
 513                 zfcp_validate_port(port);
 514         up(&zfcp_data.config_sema);
 515         return ret;
 516 }
 517
 518 /**
 519  * zfcp_scan_ports - scan remote ports and attach new ports
 520  * @adapter: pointer to struct zfcp_adapter
 521  */
 522 int zfcp_scan_ports(struct zfcp_adapter *adapter)
 523 {
 524         int ret, i;
 525         struct zfcp_gpn_ft *gpn_ft;
 526
 527         zfcp_erp_wait(adapter); /* wait until adapter is finished with ERP */
 528         if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT)
 529                 return 0;
 530
 531         ret = zfcp_scan_get_nameserver(adapter);
 532         if (ret)
 533                 return ret;
 534
 535         gpn_ft = zfcp_alloc_sg_env();
 536         if (!gpn_ft)
 537                 return -ENOMEM;
 538
 539         for (i = 0; i < 3; i++) {
 540                 ret = zfcp_scan_issue_gpn_ft(gpn_ft, adapter);
 541                 if (!ret) {
 542                         ret = zfcp_scan_eval_gpn_ft(gpn_ft);
 543                         if (ret == -EAGAIN)
 544                                 ssleep(1);
 545                         else
 546                                 break;
 547                 }
 548         }
 549         zfcp_free_sg_env(gpn_ft);
 550
 551         return ret;
 552 }
 553
 554
 555 void _zfcp_scan_ports_later(struct work_struct *work)
 556 {
 557         zfcp_scan_ports(container_of(work, struct zfcp_adapter, scan_work));
 558 }